Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (3) Sample Type Blood (3) (-) Serum or Plasma (3) Test Area Therapeutics (3) Test Category Anesthetics (5) Antianxiety (2) (-) Antidiarrheals (1) Antiepileptics/Antiseizures (5) Antihistamines (3) Antihypertensives (1) Antimicrobials (2) Antipsychotics (3) Dopamine Precursor (1) Hallucinogens (4) (-) Immunosuppressants (2) Laxatives (1) Metals/Elements (4) Mood Stabilizers (2) Pesticides/Insecticides (1) Stimulants (2) Test Sub-Category Other (3) Test Test Name 2531SP Leflunomide as Metabolite (Therapeutic Drug Monitoring), Serum/Plasma 2532SP Leflunomide as Metabolite (Pre-Pregnancy Monitoring), Serum/Plasma 2533SP Loperamide and Metabolite, Serum/Plasma